/* CODE ĐƯỢC VIẾT BỞI NC HOÀI
FACEBOOK: NGUYỄN CAO HOAI(ĐEN)
TELEGRAM: @nguyencaohoai77  */
 #music-popup {
    position: fixed;
    top: 20px;
    left: 50%;
    transform: translateX(-50%);
    background: #1c1c1e;
    border-radius: 12px;
    padding: 14px 18px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.4);
    display: flex;
    align-items: center;
    gap: 12px;
    z-index: 9999;
    max-width: 95%;
    width: 600px;
    animation: fadeIn 0.3s ease-in-out;
  }

  #music-popup img {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    flex-shrink: 0;
  }

  #music-popup span {
    flex: 1;
    font-size: 15px;
    color: white;
    line-height: 1.4;
  }

  #music-popup a {
    color: #9b9b9b;
    text-decoration: none;
    font-size: 13px;
    display: inline-block;
    margin-top: 4px;
  }

  #music-popup button {
    background: #3a42d1;
    color: white;
    border: none;
    border-radius: 20px;
    padding: 8px 14px;
    cursor: pointer;
    font-size: 14px;
    white-space: nowrap;
  }

  @media (max-width: 480px) {
    #music-popup {
      flex-direction: column;
      align-items: flex-start;
      padding: 16px;
    }

    #music-popup img {
      width: 32px;
      height: 32px;
      margin-bottom: 10px;
    }

    #music-popup button {
      width: 100%;
      text-align: center;
      margin-top: 10px;
    }
  }

  @keyframes fadeIn {
    from { opacity: 0; transform: translateX(-50%) translateY(-10px); }
    to { opacity: 1; transform: translateX(-50%) translateY(0); }
  }
.loading-screen {
   position: fixed;
   top: 0;
   left: 0;
   width: 100%;
   height: 100%;
   background: var(--bg-color);
   display: flex;
   justify-content: center;
   align-items: center;
   z-index: 9999;
   opacity: 1;
   transition: opacity 0.8s ease;
}

#page {
   display: flex;
   justify-content: center;
   align-items: center;
}

#container {
   display: flex;
   justify-content: center;
   align-items: center;
   position: relative;
}

#h3 {
   color: var(--text-muted);
   font-size: 1.2em;
   font-weight: 600;
   position: absolute;
   top: 50%;
   left: 50%;
   transform: translate(-50%, -50%);
   z-index: 10;
}

#ring {
   width: 190px;
   height: 190px;
   border: 1px solid transparent;
   border-radius: 50%;
   position: absolute;
}

#ring:nth-child(1) {
   border-bottom: 8px solid rgb(240, 42, 230);
   animation: rotate1 2s linear infinite;
}

@keyframes rotate1 {
   from {
       transform: rotateX(50deg) rotateZ(110deg);
   }
   to {
       transform: rotateX(50deg) rotateZ(470deg);
   }
}

#ring:nth-child(2) {
   border-bottom: 8px solid rgb(240, 19, 67);
   animation: rotate2 2s linear infinite;
}

@keyframes rotate2 {
   from {
       transform: rotateX(20deg) rotateY(50deg) rotateZ(20deg);
   }
   to {
       transform: rotateX(20deg) rotateY(50deg) rotateZ(380deg);
   }
}

#ring:nth-child(3) {
   border-bottom: 8px solid rgb(3, 170, 170);
   animation: rotate3 2s linear infinite;
}

@keyframes rotate3 {
   from {
       transform: rotateX(40deg) rotateY(130deg) rotateZ(450deg);
   }
   to {
       transform: rotateX(40deg) rotateY(130deg) rotateZ(90deg);
   }
}

#ring:nth-child(4) {
   border-bottom: 8px solid rgb(207, 135, 1);
   animation: rotate4 2s linear infinite;
}

@keyframes rotate4 {
   from {
       transform: rotateX(70deg) rotateZ(270deg);
   }
   to {
       transform: rotateX(70deg) rotateZ(630deg);
   }
}

.loading-spinner {
   display: none;
}

.loading-text {
   display: none;
}

.slide-in-left {
    opacity: 0;
    transform: translateX(-60px) scale(0.8) rotateY(-15deg);
    transition: all 0.8s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.slide-in-right {
    opacity: 0;
    transform: translateX(60px) scale(0.8) rotateY(15deg);
    transition: all 0.8s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.slide-in-up {
    opacity: 0;
    transform: translateY(60px) scale(0.7) rotateX(15deg);
    transition: all 0.8s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.animate-in {
    opacity: 1 !important;
    transform: translateX(0) translateY(0) scale(1) rotateX(0) rotateY(0) !important;
}

.scroll-animate {
    opacity: 0;
    transform: translateY(80px) scale(0.6) rotateX(25deg);
    transition: all 1s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    filter: blur(8px);
    will-change: transform, opacity, filter;
}

.scroll-animate.animate-in {
    opacity: 1;
    transform: translateY(0) scale(1) rotateX(0);
    filter: blur(0);
}

.profile-header.scroll-animate {
    transform: translateY(50px) scale(0.8) rotateZ(-5deg);
    transition: all 1.2s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.profile-header.scroll-animate.animate-in {
    transform: translateY(0) scale(1) rotateZ(0);
}

.social-link.scroll-animate {
    transform: translateX(-80px) scale(0.5) rotateZ(-10deg);
    transition: all 0.8s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    transition-delay: var(--delay, 0s);
}

.social-link.scroll-animate.animate-in {
    transform: translateX(0) scale(1) rotateZ(0);
}

.service-card.scroll-animate {
    opacity: 0;
    transform: translateY(100px) scale(0.4) rotateX(30deg) rotateY(20deg);
    transition: all 1s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    transition-delay: var(--delay, 0s);
    filter: blur(10px);
}

.service-card.scroll-animate.animate-in {
    opacity: 1;
    transform: translateY(0) scale(1) rotateX(0) rotateY(0);
    filter: blur(0);
}

.bank-item.scroll-animate {
    opacity: 0;
    transform: translateY(60px) scale(0.6) rotateZ(10deg);
    transition: all 0.9s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    transition-delay: var(--delay, 0s);
}

.bank-item.scroll-animate.animate-in {
    opacity: 1;
    transform: translateY(0) scale(1) rotateZ(0);
}

.code-terminal.scroll-animate {
    opacity: 0;
    transform: translateY(120px) scale(0.3) rotateX(45deg);
    transition: all 1.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    filter: blur(15px);
}

.code-terminal.scroll-animate.animate-in {
    opacity: 1;
    transform: translateY(0) scale(1) rotateX(0);
    filter: blur(0);
}

.section-title.scroll-animate {
    opacity: 0;
    transform: translateY(40px) scale(0.7) rotateZ(-3deg);
    transition: all 0.9s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.section-title.scroll-animate.animate-in {
    opacity: 1;
    transform: translateY(0) scale(1) rotateZ(0);
}

.bank-title.scroll-animate {
    opacity: 0;
    transform: translateY(40px) scale(0.8) rotateZ(5deg);
    transition: all 0.9s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.bank-title.scroll-animate.animate-in {
    opacity: 1;
    transform: translateY(0) scale(1) rotateZ(0);
}

.scroll-animate.animate-in:hover {
    animation: gentle-bounce 0.6s ease-in-out;
}

@keyframes gentle-bounce {
    0%, 20%, 50%, 80%, 100% {
        transform: translateY(0) scale(1);
    }
    40% {
        transform: translateY(-8px) scale(1.05);
    }
    60% {
        transform: translateY(-4px) scale(1.02);
    }
}

.scroll-animate.animate-in::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    animation: shimmer 1.5s ease-in-out;
    pointer-events: none;
    z-index: 1;
}

@keyframes shimmer {
    0% { left: -100%; }
    100% { left: 100%; }
}
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        :root {
            --primary-color: #2563eb;
            --secondary-color: #1e40af;
            --bg-color: #ffffff;
            --card-bg: #f8fafc;
            --text-color: #1f2937;
            --text-muted: #6b7280;
            --border-color: #e5e7eb;
            --shadow-color: rgba(37, 99, 235, 0.1);
            --terminal-bg: #0f172a;
            --terminal-text: #22c55e;
            --success-color: #10b981;
            --error-color: #ef4444;
        }

        [data-theme="dark"] {
            --primary-color: #3b82f6;
            --secondary-color: #2563eb;
            --bg-color: #020617;
            --card-bg: #1e293b;
            --text-color: #f1f5f9;
            --text-muted: #94a3b8;
            --border-color: #334155;
            --shadow-color: rgba(59, 130, 246, 0.2);
            --terminal-bg: #0f172a;
            --terminal-text: #22c55e;
        }

        body {
            font-family: 'Segoe UI', -apple-system, BlinkMacSystemFont, sans-serif;
            background: var(--bg-color);
            color: var(--text-color);
            min-height: 100vh;
            padding: 20px;
            transition: all 0.3s ease;
            position: relative;
        }

        .theme-toggle {
            position: fixed;
            top: 20px;
            right: 20px;
            z-index: 1000;
            background: var(--card-bg);
            border: 2px solid var(--border-color);
            border-radius: 50px;
            padding: 12px 16px;
            cursor: pointer;
            transition: all 0.3s ease;
            box-shadow: 0 4px 12px var(--shadow-color);
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .theme-toggle:hover {
            transform: scale(1.05);
            box-shadow: 0 6px 20px var(--shadow-color);
        }

        .theme-toggle i {
            font-size: 1.2em;
            color: var(--primary-color);
            transition: all 0.3s ease;
        }

        .container {
            max-width: 480px;
            margin: 0 auto;
            background: var(--card-bg);
            border-radius: 16px;
            padding: 40px 30px;
            box-shadow: 0 8px 32px var(--shadow-color);
            border: 1px solid var(--border-color);
            transition: all 0.3s ease;
        }

        .profile-header {
            text-align: center;
            margin-bottom: 40px;
        }

        .profile-image-wrapper {
            position: relative;
            width: 200px; 
            height: 200px; 
            margin: 0 auto 25px;
            display: flex;
            justify-content: center;
            align-items: center;
        }

        .profile-frame {
            position: absolute;
            width: 100%;
            height: 100%;
            background-image: url('/img/logo.png');
            background-size: contain;
            background-repeat: no-repeat;
            background-position: center;
            z-index: 1; 
        }

        .profile-image-container {
            position: relative; 
            width: 170px;
            height: 150px; 
            border-radius: 50%;
            overflow: hidden;
            display: flex;
            justify-content: center;
            align-items: center;
        }

        .profile-image {
            width: calc(100% - 8px); 
            height: calc(100% - 8px); 
            border-radius: 50%;
            object-fit: cover;
            border: 4px solid var(--bg-color);
            transition: all 0.3s ease;
        }

        .profile-image:hover {
            transform: scale(1.05);
        }

        .profile-name {
            font-size: 2.2em;
            font-weight: 700;
            margin-bottom: 10px;
            color: var(--text-color);
        }

        .profile-description {
            color: var(--text-muted);
            font-size: 1.1em;
            line-height: 1.6;
            margin-bottom: 35px;
        }

        .section-title {
            font-size: 1.4em;
            font-weight: 600;
            text-align: center;
            margin-bottom: 25px;
            color: var(--text-color);
            position: relative;
        }

        .section-title::after {
            content: '';
            position: absolute;
            bottom: -5px;
            left: 50%;
            transform: translateX(-50%);
            width: 50px;
            height: 3px;
            background: var(--primary-color);
            border-radius: 2px;
        }

        .social-links {
            display: flex;
            flex-direction: column;
            gap: 12px;
            margin-bottom: 35px;
        }

        .social-link {
            display: flex;
            align-items: center;
            justify-content: center;
            padding: 16px 24px;
            border-radius: 12px;
            text-decoration: none;
            color: white;
            font-weight: 500;
            font-size: 1.1em;
            transition: all 0.3s ease;
            background: var(--primary-color);
            position: relative;
            overflow: hidden;
        }

        .social-link:hover {
            background: var(--secondary-color);
            transform: translateY(-2px);
            box-shadow: 0 8px 24px var(--shadow-color);
        }

        .bank-info {
            background: var(--card-bg);
            border-radius: 12px;
            padding: 25px;
            margin-bottom: 35px;
            border: 1px solid var(--border-color);
            box-shadow: 0 4px 12px var(--shadow-color);
        }

        .bank-title {
            font-size: 1.4em;
            font-weight: 600;
            margin-bottom: 20px;
            text-align: center;
            color: var(--text-color);
        }

        .bank-details {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 15px;
        }

        .bank-item {
            background: var(--bg-color);
            padding: 20px;
            border-radius: 8px;
            border: 1px solid var(--border-color);
            transition: all 0.3s ease;
        }

        .bank-item:hover {
            transform: translateY(-3px);
            box-shadow: 0 6px 20px var(--shadow-color);
            border-color: var(--primary-color);
        }

        .bank-item h4 {
            color: var(--text-color);
            margin-bottom: 12px;
            font-size: 1.1em;
            font-weight: 600;
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .bank-item img {
            width: 24px;
            height: 24px;
            object-fit: contain;
        }

        .bank-item p {
            color: var(--text-muted);
            margin: 6px 0;
            font-size: 0.95em;
        }

        .code-line {
            margin: 2px 0;
            opacity: 0;
            animation: fadeIn 0.5s ease-in-out forwards;
        }

        @keyframes fadeIn {
            to { opacity: 1; }
        }

        .code-output {
            color: #22c55e;
            font-weight: 500;
        }

        .code-error {
            color: #ef4444;
        }

        .code-comment {
            color: #6b7280;
        }

        .code-keyword {
            color: #3b82f6;
        }

        .code-string {
            color: #f59e0b;
        }

        .cursor {
            display: inline-block;
            width: 8px;
            height: 16px;
            background: var(--terminal-text);
            animation: blink 1s infinite;
            margin-left: 2px;
        }

        @keyframes blink {
            0%, 50% { opacity: 1; }
            51%, 100% { opacity: 0; }
        }

        @media (max-width: 768px) {
            .container {
                padding: 30px 20px;
                margin: 10px;
            }
            
            .profile-name {
                font-size: 1.8em;
            }
            
            .social-link {
                padding: 14px 20px;
                font-size: 1em;
            }

            .theme-toggle {
                top: 10px;
                right: 10px;
                padding: 8px 16px;
            }
        }
.footer {
    background: linear-gradient(135deg, #667eea 0%, #4ba276 100%);
    padding: 20px 0;
    text-align: center;
    position: relative;
    overflow: hidden;
    box-shadow: 0 -2px 10px rgba(0,0,0,0.1);
}

.footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 2px;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.6), transparent);
    animation: shimmer 3s infinite;
}

@keyframes shimmer {
    0% { left: -100%; }
    100% { left: 100%; }
}

.nchoai-bq {
    margin: 0;
    color: #ffffff;
    font-size: 14px;
    font-weight: 500;
    letter-spacing: 1px;
    text-transform: uppercase;
    text-shadow: 0 1px 3px rgba(0,0,0,0.3);
    position: relative;
    z-index: 1;
}

.nchoai-bq::before {
    content: "⚡";
    margin-right: 8px;
    font-size: 16px;
    animation: pulse 2s infinite;
}

.nchoai-bq::after {
    content: "⚡";
    margin-left: 8px;
    font-size: 16px;
    animation: pulse 2s infinite 1s;
}

@keyframes pulse {
    0%, 100% { 
        opacity: 0.7;
        transform: scale(1);
    }
    50% { 
        opacity: 1;
        transform: scale(1.2);
    }
}

.footer:hover .nchoai-bq {
    transform: scale(1.05);
    transition: all 0.3s ease;
}

@media (max-width: 768px) {
    .footer {
        padding: 15px 0;
    }
    
    .nchoai-bq {
        font-size: 12px;
        letter-spacing: 0.5px;
    }
}


        html {
    scroll-behavior: smooth;
}

.services-section {
    margin-bottom: 35px;
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 20px;
    margin-bottom: 25px;
}

.service-card {
    background: var(--bg-color);
    border-radius: 12px;
    padding: 25px;
    border: 1px solid var(--border-color);
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    position: relative;
    overflow: hidden;
    opacity: 0;
    transform: translateY(30px);
    animation: fadeInUp 0.8s ease-out forwards;
}

.service-card:hover {
    transform: translateY(-8px) scale(1.02);
    box-shadow: 0 12px 40px var(--shadow-color);
    border-color: var(--primary-color);
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 3px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    transition: left 0.5s ease;
}

.service-card:hover::before {
    left: 0;
}

.service-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
    transition: all 0.3s ease;
}

.service-icon i {
    font-size: 24px;
    color: white;
}

.service-card:hover .service-icon {
    transform: rotateY(180deg);
}

.service-title {
    font-size: 1.3em;
    font-weight: 600;
    color: var(--text-color);
    margin-bottom: 12px;
}

.service-description {
    color: var(--text-muted);
    font-size: 0.95em;
    line-height: 1.6;
    margin-bottom: 15px;
}

.service-price {
    font-size: 1.1em;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 15px;
}

.service-features {
    list-style: none;
    margin-bottom: 20px;
}

.service-features li {
    color: var(--text-muted);
    font-size: 0.9em;
    margin-bottom: 8px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.service-features li::before {
    content: '✓';
    color: var(--success-color);
    font-weight: bold;
}

.service-btn {
    width: 100%;
    padding: 12px;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: 8px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
    display: inline-block;
    text-align: center;
}

.service-btn:hover {
    background: var(--secondary-color);
    transform: translateY(-2px);
}

.floating-btn {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 24px;
    box-shadow: 0 8px 25px var(--shadow-color);
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    z-index: 1000;
    opacity: 0;
    transform: scale(0);
}

.floating-btn.show {
    opacity: 1;
    transform: scale(1);
}

.floating-btn:hover {
    transform: scale(1.1) rotate(15deg);
    box-shadow: 0 12px 35px var(--shadow-color);
}

@keyframes fadeInUp {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.service-card:nth-child(1) { animation-delay: 0.1s; }
.service-card:nth-child(2) { animation-delay: 0.2s; }
.service-card:nth-child(3) { animation-delay: 0.3s; }

.scroll-indicator {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: rgba(37, 99, 235, 0.1);
    z-index: 1001;
}

.scroll-progress {
    height: 100%;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    width: 0%;
    transition: width 0.3s ease;
}

@media (max-width: 768px) {
    .services-grid {
        grid-template-columns: 1fr;
        gap: 15px;
    }
    
    .service-card {
        padding: 20px;
    }
    
    .floating-btn {
        bottom: 20px;
        right: 20px;
        width: 50px;
        height: 50px;
        font-size: 20px;
    }
}
@keyframes ripple {
    0% {
        transform: scale(0);
        opacity: 1;
    }
    100% {
        transform: scale(6);
        opacity: 0;
    }
}

@keyframes pulse {
    0% {
        transform: translateX(-100%);
        opacity: 0;
    }
    50% {
        opacity: 1;
    }
    100% {
        transform: translateX(100%);
        opacity: 0;
    }
}

.scroll-animate.animate-in.shimmer-active::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.3), transparent);
    animation: shimmer 1.5s ease-in-out;
    pointer-events: none;
    z-index: 1;
}

.scroll-animate.animate-in.shimmer-complete::before {
    display: none !important;
}

@keyframes shimmer {
    0% { 
        left: -100%; 
        opacity: 1;
    }
    99% { 
        left: 100%; 
        opacity: 1;
    }
    100% { 
        left: 100%; 
        opacity: 0;
        visibility: hidden;
    }
}

.service-card, .social-link, .bank-item {
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275) !important;
}

.service-icon {
    transition: all 0.3s ease !important;
}

.service-features li {
    transition: all 0.2s ease !important;
}

.bank-item img {
    transition: all 0.3s ease !important;
}
.skills-section {
    margin: 3rem 0;
    padding: 2rem;
    background: linear-gradient(135deg, rgba(255,255,255,0.15), rgba(255,255,255,0.05));
    border-radius: 20px;
    backdrop-filter: blur(15px);
    border: 1px solid rgba(255,255,255,0.2);
    position: relative;
    overflow: hidden;
    box-shadow: 0 8px 32px rgba(0,0,0,0.1);
}

.skills-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(45deg, transparent, rgba(255,255,255,0.1), transparent);
    pointer-events: none;
    animation: shimmer 3s infinite;
}

@keyframes shimmer {
    0% { transform: translateX(-100%); }
    100% { transform: translateX(100%); }
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 2rem;
    color: var(--text-primary);
    text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
}

.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin: 2rem 0;
}

.skill-card {
    background: rgba(255,255,255,0.12);
    border-radius: 15px;
    padding: 2rem;
    border: 1px solid rgba(255,255,255,0.15);
    transition: all 0.4s ease;
    position: relative;
    overflow: hidden;
    cursor: pointer;
    backdrop-filter: blur(10px);
}

.skill-card::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255,255,255,0.1) 0%, transparent 70%);
    transform: scale(0);
    transition: transform 0.6s ease;
}

.skill-card:hover::before {
    transform: scale(1);
}

.skill-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(0,0,0,0.2);
    border-color: rgba(255,255,255,0.3);
}

.skill-card[data-skill="html"]:hover {
    border-color: #e34f26;
    box-shadow: 0 20px 40px rgba(227,79,38,0.3);
}

.skill-card[data-skill="css"]:hover {
    border-color: #1572b6;
    box-shadow: 0 20px 40px rgba(21,114,182,0.3);
}

.skill-card[data-skill="js"]:hover {
    border-color: #f7df1e;
    box-shadow: 0 20px 40px rgba(247,223,30,0.3);
}

.skill-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
    text-align: center;
    position: relative;
    z-index: 2;
}

.skill-card[data-skill="html"] .skill-icon {
    color: #e34f26;
}

.skill-card[data-skill="css"] .skill-icon {
    color: #1572b6;
}

.skill-card[data-skill="js"] .skill-icon {
    color: #f7df1e;
}

.skill-content {
    position: relative;
    z-index: 2;
}

.skill-name {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    text-align: center;
    color: var(--text-primary);
    font-weight: 600;
}

.skill-progress {
    background: rgba(255,255,255,0.15);
    border-radius: 10px;
    height: 8px;
    margin-bottom: 1rem;
    overflow: hidden;
    position: relative;
}

.skill-bar {
    height: 100%;
    border-radius: 10px;
    position: relative;
    width: 0%;
    transition: width 2s ease;
}

.skill-card[data-skill="html"] .skill-bar {
    background: linear-gradient(90deg, #e34f26, #ff6b47);
}

.skill-card[data-skill="css"] .skill-bar {
    background: linear-gradient(90deg, #1572b6, #42a5f5);
}

.skill-card[data-skill="js"] .skill-bar {
    background: linear-gradient(90deg, #f7df1e, #ffd54f);
}

.skill-percent {
    position: absolute;
    right: 10px;
    top: -25px;
    font-size: 0.8rem;
    color: var(--text-primary);
    font-weight: bold;
}

.skill-description {
    text-align: center;
    color: var(--text-secondary);
    margin-bottom: 1rem;
    font-size: 0.9rem;
}

.skill-stats {
    display: flex;
    justify-content: center;
    gap: 1rem;
}

.stat-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-secondary);
    font-size: 0.85rem;
}

.stat-item i {
    font-size: 1rem;
}

.skills-summary {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
    margin-top: 2rem;
}

.summary-item {
    background: rgba(255,255,255,0.1);
    border-radius: 12px;
    padding: 1.5rem;
    text-align: center;
    border: 1px solid rgba(255,255,255,0.15);
    transition: all 0.3s ease;
    backdrop-filter: blur(10px);
}

.summary-item:hover {
    transform: translateY(-5px);
    background: rgba(255,255,255,0.15);
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
}

.summary-icon {
    font-size: 2rem;
    margin-bottom: 1rem;
    color: #64b5f6;
}

.summary-content h4 {
    color: var(--text-primary);
    margin-bottom: 0.5rem;
    font-size: 1rem;
    font-weight: 600;
}

.summary-number {
    font-size: 2rem;
    font-weight: bold;
    color: #64b5f6;
    display: block;
}
@media (max-width: 768px) {
    .skills-section {
        padding: 1.5rem;
        margin: 2rem 0;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .skills-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .skill-card {
        padding: 1.5rem;
    }
    
    .skill-icon {
        font-size: 2.5rem;
    }
    
    .skills-summary {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
    
    .summary-item {
        padding: 1rem;
    }
}

.skill-card.animate .skill-bar {
    animation: fillBar 2s ease forwards;
}

@keyframes fillBar {
    from { width: 0%; }
    to { width: var(--target-width); }
}

.summary-number.counting {
    animation: none;
}

@keyframes floatParticle {
    0% {
        transform: translateY(0) rotate(0deg);
        opacity: 0;
    }
    10% {
        opacity: 1;
    }
    90% {
        opacity: 1;
    }
    100% {
        transform: translateY(-100vh) rotate(360deg);
        opacity: 0;
    }
}

.nchoai {
    font-size: 16px;
    color: #666;
    min-height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-right: 2px solid #4CAF50;
    animation: blink 1s infinite;
}

@keyframes blink {
    0%, 50% { border-color: #4CAF50; }
    51%, 100% { border-color: transparent; }
}

.nchoai {
    border-right: 2px solid #4CAF50;
}
.nc-hoai {
    position: relative;
    padding-left: 20px;
    font-size: 1.2rem;
    font-weight: 600;
    color: #333;
    margin-bottom: 20px;
    display: flex;
    align-items: center;
}

.nc-hoai::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 4px;
    height: 24px;
    background: #007bff;
    border-radius: 2px;
}

[data-theme="dark"] .nc-hoai {
    color: #fff;
}
.social-link {
    display: inline-block;
    margin-bottom: 10px;
    margin-right: 10px;
    padding: 8px 16px;
    background: #f8f9fa;
    color: #333;
    text-decoration: none;
    border-radius: 6px;
    transition: all 0.3s ease;
    font-size: 0.9rem;
    font-weight: 500;
}
.social-link:hover {
    background: #007bff;
    color: #fff;
    transform: translateY(-2px);
}

.snowflake {
    position: fixed;
    top: -50px;
    z-index: 1000;
    user-select: none;
    pointer-events: none;
    color: rgba(255, 255, 255, 0.8);
    font-size: 16px;
    animation: snowfall linear infinite;
    will-change: transform;
}

@keyframes snowfall {
    0% {
        transform: translateY(-50px) translateX(0px) rotate(0deg);
        opacity: 0;
    }
    10% {
        opacity: 1;
    }
    90% {
        opacity: 1;
    }
    100% {
        transform: translateY(calc(100vh + 50px)) translateX(0px) rotate(360deg);
        opacity: 0;
    }
}

.snowflake.sway {
    animation: snowfallSway linear infinite;
}

@keyframes snowfallSway {
    0% {
        transform: translateY(-50px) translateX(0px) rotate(0deg);
        opacity: 0;
    }
    10% {
        opacity: 1;
    }
    25% {
        transform: translateY(25vh) translateX(30px) rotate(90deg);
    }
    50% {
        transform: translateY(50vh) translateX(-30px) rotate(180deg);
    }
    75% {
        transform: translateY(75vh) translateX(20px) rotate(270deg);
    }
    90% {
        opacity: 1;
    }
    100% {
        transform: translateY(calc(100vh + 50px)) translateX(0px) rotate(360deg);
        opacity: 0;
    }
}

body.dark-mode .snowflake {
    color: rgba(255, 255, 255, 0.9);
    text-shadow: 0 0 10px rgba(255, 255, 255, 0.3);
}

body:not(.dark-mode) .snowflake {
    color: rgba(135, 206, 235, 0.8);
    text-shadow: 0 0 5px rgba(135, 206, 235, 0.5);
}

.nchoai-click {
    position: fixed;
    pointer-events: none;
    z-index: 9999;
    font-size: 13px;
    font-weight: bold;
    color: #4ecdc4;
    text-shadow: 0 0 10px rgba(78, 205, 196, 0.5);
    animation: clickTextAnimation 2s ease-out forwards;
    user-select: none;
}

@keyframes clickTextAnimation {
    0% {
        opacity: 1;
        transform: translateY(0px) scale(1);
    }
    50% {
        opacity: 1;
        transform: translateY(-30px) scale(1.1);
    }
    100% {
        opacity: 0;
        transform: translateY(-60px) scale(0.8);
    }
}

.nchoai-click.gold {
    color: #ffd700;
    text-shadow: 0 0 10px rgba(255, 215, 0, 0.5);
}

.nchoai-click.green {
    color: #00ff00;
    text-shadow: 0 0 10px rgba(0, 255, 0, 0.5);
}

.nchoai-click.pink {
    color: #ff69b4;
    text-shadow: 0 0 10px rgba(255, 105, 180, 0.5);
}

.nchoai-click.purple {
    color: #9370db;
    text-shadow: 0 0 10px rgba(147, 112, 219, 0.5);
}

.nchoai-click.red {
    color: #ff4757;
    text-shadow: 0 0 10px rgba(255, 71, 87, 0.5);
}
.verified-icon {
    width: 24px;
    height: 24px;
    animation: verifiedPulse 2s ease-in-out infinite;
    filter: drop-shadow(0 0 8px rgba(78, 205, 196, 0.6));
    transition: all 0.3s ease;
}

.verified-icon:hover {
    transform: scale(1.2) rotate(360deg);
    filter: drop-shadow(0 0 15px rgba(78, 205, 196, 0.8));
}

@keyframes verifiedPulse {
    0%, 100% {
        transform: scale(1);
        filter: drop-shadow(0 0 8px rgba(78, 205, 196, 0.6));
    }
    50% {
        transform: scale(1.1);
        filter: drop-shadow(0 0 12px rgba(78, 205, 196, 0.8));
    }
}
/* CODE ĐƯỢC VIẾT BỞI NC HOÀI
FACEBOOK: NGUYỄN CAO HOAI(ĐEN)
TELEGRAM: @nguyencaohoai77  */